IPTables not forwarding from public to private subnet.

I'm trying to use IPTables nat forwarding from public ip address to
internal subnet, but it's not relaying.

Public Ip address

207.202.xxx.xxx -> 10.0.0.100 (Linux router) -> 10.1.10.15 (Linux
machine.)

I can access the linux machine from 10.0.0.100's router.

I can access the Internet and the Linux router from the Linux machine.

I'm using the iptables command:

iptables -t nat -A PREROUTING -p tcp --dport 26 -j DNAT --to
10.1.10.15:26

I'm even disabled all of the DENY rules for forwarding.

--TJ

.

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